Christmas tree controlled with an Arduino VU meter sketch. Audio was removed due to copyright, but is here: https://www.youtube.com/watch?v=sCabI3MdV9g
https://www.instructables.com/id/LED-VU-Meter-With-Arduino-UNO/
My version of the code:
https://create.arduino.cc/editor/ricemark20/1761ab72-421a-438d-83c2-ac53b8d188a1/preview